The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 17, 1978
Filed:
Jan. 09, 1976
Edouard Da Silva, Lille, FR;
Instruments S.A., Ivry-sur-Seine, FR;
Abstract
A monochromator having a concave holographic grating which is turnable in rotation and provided with an inlet slot parallel to the lines of the grating for incident light and an outlet slot also parallel to the lines of the grating, the inlet and outlet slots being disposed on opposite sides of a diametrial median plane P of the grating extending perpendicular to the lines of the grating and passing through the center of the grating. The bisector of the angle A, formed by two lines connecting the center of each slot to the center of the grating is contained in the plane P, the slots being additionally disposed such that the projection .alpha. of the angle A on the plane P is .ltoreq. 3.degree. and the projection .beta. of the angle A on the plane P' containing the bisector and perpendicular to the plane P is .ltoreq. 15.degree.. Two elementary monochromators can be connected in series and the gratings of the elementary monochromators are carried by a common rotation shaft, the image of the outlet slot of one elementary monochromator being sent to the inlet slot of the following monochromator by an optical system composed of planar mirrors, and a spherical mirror extending parallel to the gratings and turnable around an axis parallel to the axis of the shaft. SU